unslothai/unsloth · error · ValueError

At least one repo is required

Error message

At least one repo is required

What it means

Model validator _ensure_repos on GitHubRepoSeedSource requiring at least one valid repo after field validation. Because the repos field validator skips blank/whitespace entries, a list of empty strings (or a list that trims down to nothing) passes field validation but fails here — the seed source must point at some repository.

Source

Thrown at studio/backend/plugins/data-designer-github-repo-seed/src/data_designer_github_repo_seed/config.py:63

            r = r.strip()
            if not r:
                continue
            if r.count("/") != 1 or not all(r.split("/")):
                raise ValueError(f"Each repo must be `owner/name`; got {r!r}")
            out.append(r)
        return out

    @field_validator("item_types")
    @classmethod
    def _validate_item_types(cls, v: list[str]) -> list[str]:
        if not v:
            raise ValueError("item_types must not be empty")
        return list(dict.fromkeys(v))

    @model_validator(mode = "after")
    def _ensure_repos(self) -> "GitHubRepoSeedSource":
        if not self.repos:
            raise ValueError("At least one repo is required")
        return self

View on GitHub (pinned to 203007d190)

Solutions

1. Provide at least one non-empty 'owner/name' entry in repos.
2. If the value comes from an env var or template, check it actually renders (e.g. echo "${REPO_SLUG}") before running the seed job.
3. Remove placeholder empty strings from the list.

Example fix

# before
repos = [""]

# after
repos = ["owner/name"]

def has_real_repos(repos: list[str] | None) -> bool:
    return bool([r for r in (repos or []) if r.strip()])

When it happens

Trigger: Passing repos = [''], repos = [' '], or repos = [] in the recipe config. Each blank entry is skipped by _validate_repos, leaving self.repos empty, which trips this model-level check.

Common situations: YAML config where the repos entry was commented out but the list syntax remains; environment-driven configs where the repo variable is empty; templating that renders a placeholder into an empty string.

Related errors

• Each repo must be `owner/name`; got {r!r}
• item_types must not be empty
• transformer_quant '{requested_scheme}' is unavailable for '{
• '{Path(gguf_filename or '').name}' is the {picked} partition
• base_precision={base_precision!r} trains in bf16 compute; se

AI-assisted analysis of unslothai/unsloth@203007d190 (2026-08-15). Data as JSON: /api/errors/4b0c122b958692e3. Report an issue: GitHub.